9.5 Light and Vision Pages 441-444. The Hypotheses Democritus Matter composed of atoms which are carried to the soul to be viewed Empedocles Matter composed.

Slides:



Advertisements
Similar presentations
THE HUMAN EYE Gives the sense of sight. Allows us to learn more
Advertisements

MLK How the Eye Works Observations MLK How the Eye Works Parts to the Puzzle –Anatomy the study of the names of the structures in the.
THE EYE.
Light Notes 3 THE EYE.
The Eye SNC2D.
9.5 Sensory Information: Vision
L 31 Light and Optics-3 Images formed by mirrors
Ranya Marrakchi Kelsey Wright Taylor Pakulla
Review – for marks! 1) What is the difference between a mirror an a lens? 2) Why do you think we have a lens in our eye instead of a mirror?
Content Standard 5 – Contrast ways in which light rays are bent by concave and convex lenses.
Refraction of Light Refraction of light occurs when light travels from one material to another. normal i r i r AIR GLASS i – angle of incidence r – angle.
Lenses  Lenses display focusing properties because of refraction.  A convex lens will focus a parallel beam of light to a certain point.  A concave.
Parts of the Eye - Pupil.
How you See The eye & vision. How You See The eye collects light from objects and projects them on the light-sensitive portion of the eye, the retina.
Thin Lens Equation Distances of virtual images are negative & distances of real images are positive. Heights are positive if upright (above P.A.) and negative.
Dr. Jie ZouPHY The Human Eye Fundamental elements of an eye: –Cornea: light enters the eye through the transparent outer coating of the eye. –Aqueous.
L 33 Light and Optics [3] images formed by mirrors –plane mirrors –curved mirrors Concave (converging) Convex (diverging) Images formed by lenses the human.
A PowerPoint Presentation by: Ahmed Hamza & Abdulla Ali.
 Get out notes and practice from yesterday  Pick up ruler and finish practice from yesterday.
 The rods contain a light-sensitive pigment called rhodopsin.  Rhodopsin is made of 2 components: 1. Retinene/Retinal – the pigment portion made with.
The Human Visual System The Eye. Anatomy of the Human Eye Cornea Pupil Iris Sclera Retina Optic Nerve Lens.
Bellwork 1. Explain the difference between rods and cones. What happens if someone is missing a certain kind of cone? Answer: Rods work in the dark and.
Pg  The Eyeball The Eyeball  Iris: coloured part of the eye that opens and closes to let in more or less light. In the centre you find.
Application of Lenses Lenses in Eyes
Physics. PHS 5041 Optics Lenses Lenses are transparent objects with at least one curved surface. Lenses can be: _Convex or converging (***thickest at.
1 UCT PHY1025F: Geometric Optics Physics 1025F Geometric Optics Dr. Steve Peterson THE EYE.
Optometry Profession. Premedical training same as MD or any other pre-doctoral medical profession plus emphasis on more physics and statistics courses.
Lesson 3 Our eyes work in a way that is similar to a camera. Like the click of a camera lens, in the blink of an eye images are formed in the process.
The Human Eye Comparing human eye to camera Hyperopia, Presbyopia & Myopia.
18.4 Seeing Light Pg
Disorders of the eye. Astigmatism Myopia - nearsightedness Hyperopia - farsightedness Presbyopia Color blindness Cataracts Glaucoma Conjuctivitis.
Human Eye  A human eyeball is like a simple camera! Sclera: White part of the eye, outer walls, hard, like a light-tight box. Cornea and crystalline lens.
Lenses June Today  Lenses  Total Internal Reflection  Lab – Exploring Lenses  Next class:  Telescopes, rainbows & review.
Sensory Information Vision & Hearing Biology 12 S. Dosman.
Senses. Sensory relationships –All of our senses respond to stimuli in the environment –Each sense has its own specific organ –In each sense organ there.
Receptors Receptors are part of the co-ordination system that detect the changes of the environment by means of stimuli. Two types... Interoceptors – receptors.
Lenses. Applications of Light Refraction What are some common applications of the refraction of light? Cameras Microscopes Lenses Eyeglasses Human eye.
The Eye and Sight Describe the relationship between the structure of the eye and sight Contrast ways in which light rays are bent by concave and convex.
SPECIAL SENSES. the human body is very sensitive to conditions in both its internal and external environment the nervous system collects information about.
Light – Part 3 Defects in Seeing Year 7 Science. Review from last lesson We learned in our last lesson about the major parts of the eye and their function.
The Human Eye 13.6 Optics THE HUMAN EYE: How Images Are Formed The human eye gathers light from objects. In a healthy eye, a smaller, inverted, real.
Eye (Relaxed) Determine the focal length of your eye when looking at an object far away.
The Eyes and Vision. I. Anatomy of the Eye The eye consists of 3 layers or tunics Fibrous tunic- The eye consists of 3 layers or tunics Fibrous tunic-
The Human Eye. In many ways, the human eye is similar to a camera. Light enters through an opening, is focused through a lens, passes through a light-tight.
The Senses Sight and Hearing. Vision – Anatomy of the eye.
Vision. Normal Vision light is focused directly on the retina - can see clearly both near & far.
Chapter 12 Review Light and Vision. Category: The Eye Give the name and function of the eye part indicated by #3 (the thin layer between #1 and #2). Choroid.
HUMAN EYE AND LENSES. INTRODUCTION Eye is the light-sensitive organ of vision in animals. The actual process of seeing is performed by the brain rather.
Sensory Physiology The Vision Accommodation Blind spot.
Section 12.1 (Part 1) The Human Eye.
THE EYE The eye is the receptor organ that is highly specialized to trap light and very sensitive to changes in the immediate surroundings. It is located.
Coordination and Response in Plants and Animals
Construction of Human Eye –iris, pupil, cornea, aqueous humour, lens, ciliary muscle, vitreous humour, retina Focusing –seeing near object ( near point.
Structure of Human Eye: –Eye Muscles, Optic nerve, sclerotic coat –Cornea, iris, pupil,, lens, retina, blind spot –aqueous humour, vitreous humour, ciliary.
Convex and Concave Lenses
Minds-on. The Human Eye The Eye vs. the Camera The EyeThe Camera Opens and closes to adjust the amount of light that enters The IrisThe diaphragm.
Lens Applications.
The physics of vision The eye is essentially an opaque eyeball filled with a water-like fluid. In the front of the eyeball is a transparent opening known.
The Human Eye LG: I can describe the parts and function of the human eye and describe the types of images we observe and the reasons for common vision.
The Eye.
The Eye The sensory receptors in your eye detect light energy. The receptors are stimulated by light rays, which enter your eyes after bouncing off objects.
The human eye and colorful world
Section first # represents how far away from the chart the person can stand and still be able to read a particular line second # is how far away.
Structure and function of the eye
The Eye.
Human Eye Structure of Human Eye: Focusing Eye defects
The Eye Part 2: Vision Problems and Corrections.
VISION.
Unit 3: Chapter 6 Refraction.
Presentation transcript:

9.5 Light and Vision Pages

The Hypotheses Democritus Matter composed of atoms which are carried to the soul to be viewed Empedocles Matter composed of 4 elements Earth, Air, Wind and Fire and vision must be related to fire Light radiated from eye Galen Optic nerve conducted visual spirits

Today we accept the following theories: Sir Isaac Newton and Christian Huygens Particles of light (photons) travel in waves of various lengths Light enters the eye as it is reflected or transmitted from objects

Afterimages Two types of afterimages: Positive Afterimage Occurs after you look into a bright light and then close your eyes The image of the light can still be seen even with eyes closed Negative Afterimage Eye is exposed to bright coloured light for an extended period of time

Focusing the Image Refraction: slowing of light by dense material (cornea) Light is first bent by the cornea toward the pupil It is further bent by the lens to a focal point behind the lens Image is projected on the retina

Focusing the Image Light bent by cornea toward pupil Bent by lens to focal point Image projected on retina

Accommodation The adjustment of the lens to objects far and near Objects up close  pupil constricts in attempt to bring the image into focus Objects far away  pupil dilates to in an attempt to capture light

Vision Defects Glaucoma Build-up of aqueous humour Ducts are blocked Increases fluid pressure Lack of oxygen and neurons can result in blindness

Cataract Lens becomes opaque Prevents light from passing through Solution: remove lens and use strong eyeglasses or replace with plastic lens

Myopia (nearsightedness) Eye ball is too long Distant image is brought into focus in front of the retina Hyperopia (farsightedness) Eye ball is too short Distant image is brought into focus behind retina

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2024 SlidePlayer.com Inc. All rights reserved.